TPC/AliTPCv1.cxx

   1 /**************************************************************************
   2  * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
   3  *                                                                        *
   4  * Author: The ALICE Off-line Project.                                    *
   5  * Contributors are mentioned in the code where appropriate.              *
   6  *                                                                        *
   7  * Permission to use, copy, modify and distribute this software and its   *
   8  * documentation strictly for non-commercial purposes is hereby granted   *
   9  * without fee, provided that the above copyright notice appears in all   *
  10  * copies and that both the copyright notice and this permission notice   *
  11  * appear in the supporting documentation. The authors make no claims     *
  12  * about the suitability of this software for any purpose. It is          *
  13  * provided "as is" without express or implied warranty.                  *
  14  **************************************************************************/
  15
  16 /* $Id$ */
  17
  18 //
  19 ///////////////////////////////////////////////////////////////////////////////
  20 //                                                                           //
  21 //  Time Projection Chamber version 1 -- detailed TPC and fast simulation    //
  22 //                                                                           //
  23 //Begin_Html
  24 /*
  25 <img src="picts/AliTPCv1Class.gif">
  26 */
  27 //End_Html
  28 //                                                                           //
  29 //                                                                           //
  30 ///////////////////////////////////////////////////////////////////////////////
  31
  32 #include <Riostream.h>
  33 #include <stdlib.h>
  34 #include <TInterpreter.h>
  35 #include <TMath.h>
  36 #include <TVirtualMC.h>
  37 #include <TString.h>
  38 #include <TSystem.h>
  39
  40 #include "AliConst.h"
  41 #include "AliRun.h"
  42 #include "AliTPCDigitsArray.h"
  43 #include "AliTPCParam.h"
  44 #include "AliTPCParamSR.h"
  45 #include "AliTPCv1.h"
  46 #include "TLorentzVector.h"
  47 #include "TGeoCone.h"
  48 #include "AliMC.h"
  49 #include "TGeoManager.h"
  50 #include "TGeoVolume.h"
  51 #include "TGeoPcon.h"
  52 #include "TGeoTube.h"
  53 #include "TGeoPgon.h"
  54 #include "TGeoTrd1.h"
  55 #include "TGeoCompositeShape.h"
  56 #include "TGeoPara.h"
  57
  58 using std::ifstream;
  59 using std::ios_base;
  60 ClassImp(AliTPCv1)
  61
  62 //_____________________________________________________________________________
  63
  64   AliTPCv1::AliTPCv1():AliTPC(),fIdSens(0)
  65 {
  66
  67   fHitType = 1;
  68
  69 }
  70
  71 //_____________________________________________________________________________
  72 AliTPCv1::AliTPCv1(const char *name, const char *title)
  73   :AliTPC(name, title),fIdSens(0)
  74  {
  75   //
  76   // Standard constructor for Time Projection Chamber
  77   //
  78
  79
  80   if (fTPCParam)
  81      fTPCParam->Write(fTPCParam->GetTitle());
  82
  83   fHitType=1;
  84 }
  85
  86 //_____________________________________________________________________________
  87 void AliTPCv1::CreateGeometry()
  88 {
  89   //-------------------------------------------------------------
  90   // Creates geometry for Time Projection Chamber version 1
  91   // Detailed geometry -- Fast simulation - space points
  92   // at the pad-rows centers
  93   // Origin M.Kowalski, INP Cracow, Marek.Kowalski@ifj.edu.pl
  94   //-----------------------------------------------------------
  95
  96   //Begin_Html
  97   /*
  98     <img src="picts/AliTPC.gif">
  99   */
 100   //End_Html
 101   //Begin_Html
 102   /*
 103     <img src="picts/AliTPCv1Tree.gif">
 104   */
 105   //End_Html
 106   //----------------------------------------------------------
 107   // This geometry is written using TGeo class
 108   // Firstly the shapes are defined, and only then the volumes
 109   // What is recognized by the MC are volumes
 110   //----------------------------------------------------------
 111   //
 112   //  tpc - this will be the mother volume
 113   //
 114
 115   //
 116   // here I define a volume TPC
 117   // retrive the medium name with "TPC_" as a leading string
 118   //
 119   TGeoPcon *tpc = new TGeoPcon(0.,360.,30); //30 sections
 120   //
 121   tpc->DefineSection(0,-289.6,77.,278.);
 122   tpc->DefineSection(1,-262.1,77.,278.);
 123   //
 124   tpc->DefineSection(2,-262.1,83.1,278.);
 125   tpc->DefineSection(3,-260.,83.1,278.);
 126   //
 127   tpc->DefineSection(4,-260.,70.,278.);
 128   tpc->DefineSection(5,-259.6,70.,278.);
 129   //
 130   tpc->DefineSection(6,-259.6,68.1,278.);
 131   tpc->DefineSection(7,-253.6,68.1,278.);
 132   //
 133   tpc->DefineSection(8,-253.6,67.88,278.);//hs
 134   tpc->DefineSection(9,-74.0,60.68,278.);// hs
 135   //
 136   tpc->DefineSection(10,-74.0,60.1,278.);
 137   tpc->DefineSection(11,-73.3,60.1,278.);
 138   //
 139   tpc->DefineSection(12,-73.3,56.9,278.);
 140   tpc->DefineSection(13,-68.5,56.9,278.);
 141   //
 142   tpc->DefineSection(14,-68.5,60.,278.);
 143   tpc->DefineSection(15,-64.7,60.,278.);
 144   //
 145   tpc->DefineSection(16,-64.7,56.9,278.);
 146   tpc->DefineSection(17,73.3,56.9,278.);
 147   //
 148   tpc->DefineSection(18,73.3,60.1,278.);
 149   tpc->DefineSection(19,74.0,60.1,278.);
 150   //
 151   tpc->DefineSection(20,74.0,60.68,278.);// hs
 152   tpc->DefineSection(21,253.6,65.38,278.);// hs
 153   //
 154   tpc->DefineSection(22,253.6,65.6,278.);
 155   tpc->DefineSection(23,259.6,65.6,278.);
 156   //
 157   tpc->DefineSection(24,259.6,70.0,278.);
 158   tpc->DefineSection(25,260.,70.0,278.);
 159   //
 160   tpc->DefineSection(26,260.,83.1,278.);
 161   tpc->DefineSection(27,262.1,83.1,278.);
 162   //
 163   tpc->DefineSection(28,262.1,77.,278);
 164   tpc->DefineSection(29,289.6,77.,278.);
 165
 166
 167   //
 168   TGeoMedium *m1 = gGeoManager->GetMedium("TPC_Air");
 169   TGeoVolume *v1 = new TGeoVolume("TPC_M",tpc,m1);
 170   //
 171   // drift volume - sensitive volume, extended beyond the
 172   // endcaps, because of the alignment
 173   //
 174   TGeoPcon *dvol = new TGeoPcon(0.,360.,6);
 175   dvol->DefineSection(0,-260.,74.5,264.4);
 176   dvol->DefineSection(1,-253.6,74.5,264.4);
 177   //
 178   dvol->DefineSection(2,-253.6,76.6774,258.);
 179   dvol->DefineSection(3,253.6,76.6774,258.);
 180   //
 181   dvol->DefineSection(4,253.6,74.5,264.4);
 182   dvol->DefineSection(5,260.,74.5,264.4);
 183   //
 184   TGeoMedium *m5 = gGeoManager->GetMedium("TPC_Ne-CO2-1");
 185   TGeoVolume *v9 = new TGeoVolume("TPC_Drift",dvol,m5);
 186   //
 187   //
 188   v1->AddNode(v9,1);
 189   //
 190   // outer insulator
 191   //
 192   TGeoPcon *tpco = new TGeoPcon(0.,360.,6); //insulator
 193   //
 194   tpco->DefineSection(0,-256.6,264.8,278.);
 195   tpco->DefineSection(1,-253.6,264.8,278.);
 196   //
 197   tpco->DefineSection(2,-253.6,258.,278.);
 198   tpco->DefineSection(3,250.6,258.,278.);
 199   //
 200   tpco->DefineSection(4,250.6,258.,275.5);
 201   tpco->DefineSection(5,253.6,258.,275.5);
 202   //
 203   TGeoMedium *m2 = gGeoManager->GetMedium("TPC_CO2");
 204   TGeoVolume *v2 = new TGeoVolume("TPC_OI",tpco,m2);
 205   //
 206   // outer containment vessel
 207   //
 208   TGeoPcon *tocv = new TGeoPcon(0.,360.,6);  // containment vessel
 209   //
 210   tocv->DefineSection(0,-256.6,264.8,278.);
 211   tocv->DefineSection(1,-253.6,264.8,278.);
 212   //
 213   tocv->DefineSection(2,-253.6,274.8124,278.);
 214   tocv->DefineSection(3,247.6,274.8124,278.);
 215   //
 216   tocv->DefineSection(4,247.6,270.4,278.);
 217   tocv->DefineSection(5,250.6,270.4,278.);
 218   //
 219   TGeoMedium *m3 = gGeoManager->GetMedium("TPC_Al");
 220   TGeoVolume *v3 = new TGeoVolume("TPC_OCV",tocv,m3);
 221   //
 222   TGeoTube *to1 = new TGeoTube(274.8174,277.995,252.1); //epoxy
 223   TGeoTube *to2 = new TGeoTube(274.8274,277.985,252.1); //tedlar
 224   TGeoTube *to3 = new TGeoTube(274.8312,277.9812,252.1);//prepreg2
 225   TGeoTube *to4 = new TGeoTube(274.9062,277.9062,252.1);//nomex
 226   //
 227   TGeoMedium *sm1 = gGeoManager->GetMedium("TPC_Epoxy");
 228   TGeoMedium *sm2 = gGeoManager->GetMedium("TPC_Tedlar");
 229   TGeoMedium *sm3 = gGeoManager->GetMedium("TPC_Prepreg2");
 230   TGeoMedium *sm4 = gGeoManager->GetMedium("TPC_Nomex");
 231   //
 232   TGeoVolume *tov1 = new TGeoVolume("TPC_OCV1",to1,sm1);
 233   TGeoVolume *tov2 = new TGeoVolume("TPC_OCV2",to2,sm2);
 234   TGeoVolume *tov3 = new TGeoVolume("TPC_OCV3",to3,sm3);
 235   TGeoVolume *tov4 = new TGeoVolume("TPC_OCV4",to4,sm4);
 236   TGeoMedium *mhs = gGeoManager->GetMedium("TPC_Steel");
 237   TGeoMedium *m12 =  gGeoManager->GetMedium("TPC_Water");
 238   //-------------------------------------------------------
 239   //  Tpc Outer Field Cage
 240   //  daughters - composite (sandwich)
 241   //-------------------------------------------------------
 242
 243   TGeoPcon *tofc = new TGeoPcon(0.,360.,6);
 244   //
 245   tofc->DefineSection(0,-253.6,258.,269.6);
 246   tofc->DefineSection(1,-250.6,258.,269.6);
 247   //
 248   tofc->DefineSection(2,-250.6,258.,260.0676);
 249   tofc->DefineSection(3,250.6,258.,260.0676);
 250   //
 251   tofc->DefineSection(4,250.6,258.,275.5);
 252   tofc->DefineSection(5,253.6,258.,275.5);
 253   //
 254   TGeoVolume *v4 = new TGeoVolume("TPC_TOFC",tofc,m3);
 255   //sandwich
 256   TGeoTube *tf1 = new TGeoTube(258.0,260.0676,252.1); //tedlar
 257   TGeoTube *tf2 = new TGeoTube(258.0038,260.0638,252.1); //prepreg3
 258   TGeoTube *tf3 = new TGeoTube(258.0338,260.0338,252.1);//nomex
 259   //
 260   TGeoMedium *sm5 = gGeoManager->GetMedium("TPC_Prepreg3");
 261   //
 262   TGeoVolume *tf1v = new TGeoVolume("TPC_OFC1",tf1,sm2);
 263   TGeoVolume *tf2v = new TGeoVolume("TPC_OFC2",tf2,sm5);
 264   TGeoVolume *tf3v = new TGeoVolume("TPC_OFC3",tf3,sm4);
 265   //
 266   // outer part - positioning
 267   //
 268   tov1->AddNode(tov2,1); tov2->AddNode(tov3,1); tov3->AddNode(tov4,1);
 269   //
 270   tf1v->AddNode(tf2v,1); tf2v->AddNode(tf3v,1);
 271   //
 272   v3->AddNode(tov1,1,new TGeoTranslation(0.,0.,-1.5)); v4->AddNode(tf1v,1);
 273   //
 274   v2->AddNode(v3,1); v2->AddNode(v4,1);
 275   //
 276   v1->AddNode(v2,1);
 277   //--------------------------------------------------------------------
 278   // Tpc Inner INsulator (CO2)
 279   // the cones, the central drum and the inner f.c. sandwich with a piece
 280   // of the flane will be placed in the TPC
 281   //--------------------------------------------------------------------
 282   TGeoPcon *tpci = new TGeoPcon(0.,360.,4);
 283   //
 284   tpci->DefineSection(0,-253.6,68.4,76.6774);
 285   tpci->DefineSection(1,-74.0,61.2,76.6774);
 286   //
 287   tpci->DefineSection(2,74.0,61.2,76.6774);
 288   //
 289   tpci->DefineSection(3,253.6,65.9,76.6774);
 290   //
 291   TGeoVolume *v5 = new TGeoVolume("TPC_INI",tpci,m2);
 292   //
 293   // now the inner field cage - only part of flanges (2 copies)
 294   //
 295   TGeoTube *tif1 = new TGeoTube(69.9,76.6774,1.5);
 296   TGeoVolume *v6 = new TGeoVolume("TPC_IFC1",tif1,m3);
 297   //
 298  //---------------------------------------------------------
 299   // Tpc Inner Containment vessel - Muon side
 300   //---------------------------------------------------------
 301   TGeoPcon *tcms = new TGeoPcon(0.,360.,10);
 302   //
 303   tcms->DefineSection(0,-259.1,68.1,74.2);
 304   tcms->DefineSection(1,-253.6,68.1,74.2);
 305   //
 306   tcms->DefineSection(2,-253.6,68.1,68.4);
 307   tcms->DefineSection(3,-74.0,60.9,61.2);
 308   //
 309   tcms->DefineSection(4,-74.0,60.1,61.2);
 310   tcms->DefineSection(5,-73.3,60.1,61.2);
 311   //
 312   tcms->DefineSection(6,-73.3,56.9,61.2);
 313   tcms->DefineSection(7,-73.0,56.9,61.2);
 314   //
 315   tcms->DefineSection(8,-73.0,56.9,58.8);
 316   tcms->DefineSection(9,-71.3,56.9,58.8);
 317   //
 318   TGeoVolume *v7 = new TGeoVolume("TPC_ICVM",tcms,m3);
 319   //------------------------------------------------
 320   //  Heat screen muon side
 321   //------------------------------------------------
 322
 323   TGeoCone *thsm = new TGeoCone(89.8,67.88,68.1,60.68,60.9);
 324   TGeoCone *thsmw = new TGeoCone(89.8,67.94,68.04,60.74,60.84);
 325   TGeoVolume *hvsm = new TGeoVolume("TPC_HSM",thsm,mhs); //steel
 326   TGeoVolume *hvsmw = new TGeoVolume("TPC_HSMW",thsmw,m12); //water
 327   // assembly heat screen muon
 328   hvsm->AddNode(hvsmw,1);
 329   //-----------------------------------------------
 330   // inner containment vessel - shaft side
 331   //-----------------------------------------------
 332   TGeoPcon *tcss = new TGeoPcon(0.,360.,10);
 333   //
 334   tcss->DefineSection(0,71.3,56.9,58.8);
 335   tcss->DefineSection(1,73.0,56.9,58.8);
 336   //
 337   tcss->DefineSection(2,73.0,56.9,61.2);
 338   tcss->DefineSection(3,73.3,56.9,61.2);
 339   //
 340   tcss->DefineSection(4,73.3,60.1,61.2);
 341   tcss->DefineSection(5,74.0,60.1,61.2);
 342   //
 343   tcss->DefineSection(6,74.0,60.9,61.2);
 344   tcss->DefineSection(7,253.6,65.6,65.9);
 345   //
 346   tcss->DefineSection(8,253.6,65.6,74.2);
 347   tcss->DefineSection(9,258.1,65.6,74.2);
 348   //
 349   TGeoVolume *v8 = new TGeoVolume("TPC_ICVS",tcss,m3);
 350   //-------------------------------------------------
 351   //  Heat screen shaft side
 352   //--------------------------------------------------
 353   TGeoCone *thss = new TGeoCone(89.8,60.68,60.9,65.38,65.6);
 354   TGeoCone *thssw = new TGeoCone(89.8,60.74,60.84,65.44,65.54);
 355   TGeoVolume *hvss = new TGeoVolume("TPC_HSS",thss,mhs); //steel
 356   TGeoVolume *hvssw = new TGeoVolume("TPC_HSSW",thssw,m12); //water
 357   //assembly heat screen shaft
 358   hvss->AddNode(hvssw,1);
 359   //-----------------------------------------------
 360   //  Inner field cage
 361   //  define 4 parts and make an assembly
 362   //-----------------------------------------------
 363   // part1 - Al - 2 copies
 364   TGeoTube *t1 = new TGeoTube(76.6774,78.845,0.75);
 365   TGeoVolume *tv1 = new TGeoVolume("TPC_IFC2",t1,m3);
 366   // sandwich - outermost parts - 2 copies
 367   TGeoTube *t2 = new TGeoTube(76.6774,78.845,74.175); // tedlar 38 microns
 368   TGeoTube *t3 = new TGeoTube(76.6812,78.8412,74.175); // prepreg2 500 microns
 369   TGeoTube *t4 = new TGeoTube(76.7312,78.7912,74.175); // prepreg3 300 microns
 370   TGeoTube *t5 = new TGeoTube(76.7612,78.7612,74.175); // nomex 2 cm
 371   //
 372   TGeoVolume *tv2 = new TGeoVolume("TPC_IFC3",t2,sm2);
 373   TGeoVolume *tv3 = new TGeoVolume("TPC_IFC4",t3,sm3);
 374   TGeoVolume *tv4 = new TGeoVolume("TPC_IFC5",t4,sm5);
 375   TGeoVolume *tv5 = new TGeoVolume("TPC_IFC6",t5,sm4);
 376   //
 377   // middle parts - 2 copies
 378   TGeoTube *t6 = new TGeoTube(76.6774,78.795,5.); // tedlar 38 microns
 379   TGeoTube *t7 = new TGeoTube(76.6812,78.7912,5.); // prepreg2 250 microns
 380   TGeoTube *t8 = new TGeoTube(76.7062,78.7662,5.); // prepreg3 300 microns
 381   TGeoTube *t9 = new TGeoTube(76.7362,78.7362,5.); // nomex 2 cm
 382   //
 383   TGeoVolume *tv6 = new TGeoVolume("TPC_IFC7",t6,sm2);
 384   TGeoVolume *tv7 = new TGeoVolume("TPC_IFC8",t7,sm3);
 385   TGeoVolume *tv8 = new TGeoVolume("TPC_IFC9",t8,sm5);
 386   TGeoVolume *tv9 = new TGeoVolume("TPC_IFC10",t9,sm4);
 387   // central part - 1 copy
 388   TGeoTube *t10 = new TGeoTube(76.6774,78.745,93.75); // tedlar 38 microns
 389   TGeoTube *t11 = new TGeoTube(76.6812,78.7412,93.75); // prepreg3 300 microns
 390   TGeoTube *t12 = new TGeoTube(76.7112,78.7112,93.75); // nomex 2 cm
 391   //
 392   TGeoVolume *tv10 = new TGeoVolume("TPC_IFC11",t10,sm2);
 393   TGeoVolume *tv11 = new TGeoVolume("TPC_IFC12",t11,sm5);
 394   TGeoVolume *tv12 = new TGeoVolume("TPC_IFC13",t12,sm4);
 395   //
 396   // inner part - positioning
 397   //
 398   // creating a sandwich
 399   tv2->AddNode(tv3,1); tv3->AddNode(tv4,1); tv4->AddNode(tv5,1);
 400   //
 401   tv6->AddNode(tv7,1); tv7->AddNode(tv8,1); tv8->AddNode(tv9,1);
 402   //
 403   tv10->AddNode(tv11,1); tv11->AddNode(tv12,1);
 404   //
 405   TGeoVolumeAssembly *tv100 = new TGeoVolumeAssembly("TPC_IFC");
 406   //
 407   tv100->AddNode(tv10,1);
 408   tv100->AddNode(tv6,1,new TGeoTranslation(0.,0.,-98.75));
 409   tv100->AddNode(tv6,2,new TGeoTranslation(0.,0.,98.75));
 410   tv100->AddNode(tv2,1,new TGeoTranslation(0.,0.,-177.925));
 411   tv100->AddNode(tv2,2,new TGeoTranslation(0.,0.,177.925));
 412   tv100->AddNode(tv1,1,new TGeoTranslation(0.,0.,-252.85));
 413   tv100->AddNode(tv1,2,new TGeoTranslation(0.,0.,252.85));
 414   //
 415   v5->AddNode(v6,1, new TGeoTranslation(0.,0.,-252.1));
 416   v5->AddNode(v6,2, new TGeoTranslation(0.,0.,252.1));
 417   v1->AddNode(v5,1); v1->AddNode(v7,1); v1->AddNode(v8,1);
 418   v1->AddNode(hvsm,1,new TGeoTranslation(0.,0.,-163.8));
 419   v1->AddNode(hvss,1,new TGeoTranslation(0.,0.,163.8));
 420   v9->AddNode(tv100,1);
 421   //
 422   // central drum
 423   //
 424   // flange + sandwich
 425   //
 426   TGeoPcon *cfl = new TGeoPcon(0.,360.,6);
 427   cfl->DefineSection(0,-71.1,59.7,61.2);
 428   cfl->DefineSection(1,-68.6,59.7,61.2);
 429   //
 430   cfl->DefineSection(2,-68.6,60.6324,61.2);
 431   cfl->DefineSection(3,68.6,60.6324,61.2);
 432   //
 433   cfl->DefineSection(4,68.6,59.7,61.2);
 434   cfl->DefineSection(5,71.1,59.7,61.2);
 435   //
 436   TGeoVolume *cflv = new TGeoVolume("TPC_CDR",cfl,m3);
 437   // sandwich
 438   TGeoTube *cd1 = new TGeoTube(60.6424,61.19,71.1);
 439   TGeoTube *cd2 = new TGeoTube(60.6462,61.1862,71.1);
 440   TGeoTube *cd3 = new TGeoTube(60.6662,61.1662,71.1);
 441   //
 442   TGeoMedium *sm6 = gGeoManager->GetMedium("TPC_Prepreg1");
 443   TGeoVolume *cd1v = new TGeoVolume("TPC_CDR1",cd1,sm2); //tedlar
 444   TGeoVolume *cd2v = new TGeoVolume("TPC_CDR2",cd2,sm6);// prepreg1
 445   TGeoVolume *cd3v = new TGeoVolume("TPC_CDR3",cd3,sm4); //nomex
 446   //
 447   // seals for central drum 2 copies
 448   //
 449   TGeoTube *cs = new TGeoTube(56.9,61.2,0.1);
 450   TGeoMedium *sm7 = gGeoManager->GetMedium("TPC_Mylar");
 451   TGeoVolume *csv = new TGeoVolume("TPC_CDRS",cs,sm7);
 452   v1->AddNode(csv,1,new TGeoTranslation(0.,0.,-71.2));
 453   v1->AddNode(csv,2,new TGeoTranslation(0.,0.,71.2));
 454   //
 455   // seal collars
 456   TGeoPcon *se = new TGeoPcon(0.,360.,6);
 457   se->DefineSection(0,-72.8,59.7,61.2);
 458   se->DefineSection(1,-72.3,59.7,61.2);
 459   //
 460   se->DefineSection(2,-72.3,58.85,61.2);
 461   se->DefineSection(3,-71.6,58.85,61.2);
 462   //
 463   se->DefineSection(4,-71.6,59.7,61.2);
 464   se->DefineSection(5,-71.3,59.7,61.2);
 465   //
 466   TGeoVolume *sev = new TGeoVolume("TPC_CDCE",se,m3);
 467   //
 468   TGeoTube *si = new TGeoTube(56.9,58.8,1.);
 469   TGeoVolume *siv = new TGeoVolume("TPC_CDCI",si,m3);
 470   //
 471   // define reflection matrix
 472   //
 473   TGeoRotation *ref = new TGeoRotation("ref",90.,0.,90.,90.,180.,0.);
 474   //
 475   cd1v->AddNode(cd2v,1); cd2v->AddNode(cd3v,1); cflv->AddNode(cd1v,1);
 476   //
 477   v1->AddNode(siv,1,new TGeoTranslation(0.,0.,-69.9));
 478   v1->AddNode(siv,2,new TGeoTranslation(0.,0.,69.9));
 479   v1->AddNode(sev,1); v1->AddNode(sev,2,ref); v1->AddNode(cflv,1);
 480   //
 481   // central membrane - 2 rings and a mylar membrane - assembly
 482   //
 483   TGeoTube *ih = new TGeoTube(81.05,84.05,0.3);
 484   TGeoTube *oh = new TGeoTube(250.,256.,.5);
 485   TGeoTube *mem = new TGeoTube(84.05,250,0.01);
 486   TGeoVolume *ihv = new TGeoVolume("TPC_IHVH",ih,m3);
 487   TGeoVolume *ohv = new TGeoVolume("TPC_OHVH",oh,m3);
 488   TGeoVolume *memv = new TGeoVolume("TPC_HV",mem,sm7);
 489   //
 490   TGeoVolumeAssembly *cm = new TGeoVolumeAssembly("TPC_HVMEM");
 491   cm->AddNode(ihv,1);
 492   cm->AddNode(ohv,1);
 493   cm->AddNode(memv,1);
 494   v9->AddNode(cm,1);
 495   //
 496   // end caps - they are make as an assembly of single segments
 497   // containing both readout chambers
 498   //
 499   Double_t openingAngle = 10.*TMath::DegToRad();
 500   Double_t thick=1.5; // rib
 501   Double_t shift = thick/TMath::Sin(openingAngle);
 502   //
 503   Double_t lowEdge = 86.3; // hole in the wheel
 504   Double_t upEdge = 240.4; // hole in the wheel
 505   //
 506   new TGeoTubeSeg("sec",74.5,264.4,3.,0.,20.);
 507   //
 508   TGeoPgon *hole = new TGeoPgon("hole",0.,20.,1,4);
 509   //
 510   hole->DefineSection(0,-3.5,lowEdge-shift,upEdge-shift);
 511   hole->DefineSection(1,-1.5,lowEdge-shift,upEdge-shift);
 512   //
 513   hole->DefineSection(2,-1.5,lowEdge-shift,upEdge+3.-shift);
 514   hole->DefineSection(3,3.5,lowEdge-shift,upEdge+3.-shift);
 515   //
 516   Double_t ys = shift*TMath::Sin(openingAngle);
 517   Double_t xs = shift*TMath::Cos(openingAngle);
 518   TGeoTranslation *tr = new TGeoTranslation("tr",xs,ys,0.);
 519   tr->RegisterYourself();
 520   TGeoCompositeShape *chamber = new TGeoCompositeShape("sec-hole:tr");
 521   TGeoVolume *sv = new TGeoVolume("TPC_WSEG",chamber,m3);
 522   TGeoPgon *bar = new TGeoPgon("bar",0.,20.,1,2);
 523   bar->DefineSection(0,-3.,131.5-shift,136.5-shift);
 524   bar->DefineSection(1,1.5,131.5-shift,136.5-shift);
 525   TGeoVolume *barv = new TGeoVolume("TPC_WBAR",bar,m3);
 526   TGeoVolumeAssembly *ch = new TGeoVolumeAssembly("TPC_WCH");//empty segment
 527   //
 528   ch->AddNode(sv,1); ch->AddNode(barv,1,tr);
 529   //
 530   // readout chambers
 531   //
 532   // IROC first
 533   //
 534    TGeoTrd1 *ibody = new TGeoTrd1(13.8742,21.3328,4.29,21.15);
 535    TGeoVolume *ibdv = new TGeoVolume("TPC_IROCB",ibody,m3);
 536   // empty space
 537    TGeoTrd1 *emp = new TGeoTrd1(12.3742,19.8328,3.99,19.65);
 538    TGeoVolume *empv = new TGeoVolume("TPC_IROCE",emp,m1);
 539    ibdv->AddNode(empv,1,new TGeoTranslation(0.,-0.3,0.));
 540    //bars
 541    Double_t tga = (19.8328-12.3742)/39.3;
 542    Double_t xmin,xmax;
 543    xmin = 9.55*tga+12.3742;
 544    xmax = 9.95*tga+12.3742;
 545    TGeoTrd1 *ib1 = new TGeoTrd1(xmin,xmax,3.29,0.2);
 546    TGeoVolume *ib1v = new TGeoVolume("TPC_IRB1",ib1,m3);
 547    empv->AddNode(ib1v,1,new TGeoTranslation("tt1",0.,0.7,-9.9));
 548    xmin=19.4*tga+12.3742;
 549    xmax=19.9*tga+12.3742;
 550    TGeoTrd1 *ib2 = new TGeoTrd1(xmin,xmax,3.29,0.25);
 551    TGeoVolume *ib2v = new TGeoVolume("TPC_TRB2",ib2,m3);
 552    empv->AddNode(ib2v,1,new TGeoTranslation(0.,0.7,0.));
 553    xmin=29.35*tga+12.3742;
 554    xmax=29.75*tga+12.3742;
 555    TGeoTrd1 *ib3 = new TGeoTrd1(xmin,xmax,3.29,0.2);
 556    TGeoVolume *ib3v = new TGeoVolume("TPC_IRB3",ib3,m3);
 557    empv->AddNode(ib3v,1,new TGeoTranslation(0.,0.7,9.9));
 558    //
 559    // holes for connectors
 560    //
 561    TGeoBBox *conn = new TGeoBBox(0.4,0.3,4.675); // identical for iroc and oroc
 562    TGeoVolume *connv = new TGeoVolume("TPC_RCCON",conn,m1);
 563    TString fileName(gSystem->Getenv("ALICE_ROOT"));
 564    fileName += "/TPC/conn_iroc.dat";
 565    ifstream in;
 566    in.open(fileName.Data(), ios_base::in); // asci file
 567    for(Int_t i =0;i<86;i++){
 568       Double_t y = 3.99;
 569       Double_t x,z,ang;
 570       in>>x>>z>>ang;
 571       z-=26.5;
 572       TGeoRotation *rrr = new TGeoRotation();
 573       rrr->RotateY(ang);
 574       TGeoCombiTrans *trans = new TGeoCombiTrans("trans",x,y,z,rrr);
 575       ibdv->AddNode(connv,i+1,trans);
 576    }
 577    in.close();
 578    // "cap"
 579    new TGeoTrd1("icap",14.5974,23.3521,1.19,24.825);
 580    // "hole"
 581    new TGeoTrd1("ihole",13.8742,21.3328,1.2,21.15);
 582    TGeoTranslation *tr1 = new TGeoTranslation("tr1",0.,0.,1.725);
 583    tr1->RegisterYourself();
 584    TGeoCompositeShape *ic = new TGeoCompositeShape("icap-ihole:tr1");
 585    TGeoVolume *icv = new TGeoVolume("TPC_IRCAP",ic,m3);
 586    //
 587    // pad plane and wire fixations
 588    //
 589    TGeoTrd1 *pp = new TGeoTrd1(14.5974,23.3521,0.3,24.825); //pad+iso
 590    TGeoMedium *m4 = gGeoManager->GetMedium("TPC_G10");
 591    TGeoVolume *ppv = new TGeoVolume("TPC_IRPP",pp,m4);
 592    TGeoPara *f1 = new TGeoPara(.6,.5,24.825,0.,-10.,0.);
 593    TGeoVolume *f1v = new TGeoVolume("TPC_IRF1",f1,m4);
 594    TGeoPara *f2 = new TGeoPara(.6,.5,24.825,0.,10.,0.);
 595    TGeoVolume *f2v = new TGeoVolume("TPC_IRF2",f2,m4);
 596    //
 597    TGeoVolumeAssembly *iroc = new TGeoVolumeAssembly("TPC_IROC");
 598    //
 599    iroc->AddNode(ibdv,1);
 600    iroc->AddNode(icv,1,new TGeoTranslation(0.,3.1,-1.725));
 601    iroc->AddNode(ppv,1,new TGeoTranslation(0.,4.59,-1.725));
 602    tga =(23.3521-14.5974)/49.65;
 603    Double_t xx = 24.825*tga+14.5974-0.6;
 604    iroc->AddNode(f1v,1,new TGeoTranslation(-xx,5.39,-1.725));
 605    iroc->AddNode(f2v,1,new TGeoTranslation(xx,5.39,-1.725));
 606    //
 607    // OROC
 608    //
 609    TGeoTrd1 *obody = new TGeoTrd1(22.2938,40.5084,4.19,51.65);
 610    TGeoVolume *obdv = new TGeoVolume("TPC_OROCB",obody,m3);
 611    TGeoTrd1 *oemp = new TGeoTrd1(20.2938,38.5084,3.89,49.65);
 612    TGeoVolume *oempv = new TGeoVolume("TPC_OROCE",oemp,m1);
 613    obdv->AddNode(oempv,1,new TGeoTranslation(0.,-0.3,0.));
 614    //horizontal bars
 615    tga=(38.5084-20.2938)/99.3;
 616    xmin=tga*10.2+20.2938;
 617    xmax=tga*10.6+20.2938;
 618    TGeoTrd1 *ob1 = new TGeoTrd1(xmin,xmax,2.915,0.2);
 619    TGeoVolume *ob1v = new TGeoVolume("TPC_ORB1",ob1,m3);
 620    //
 621    xmin=22.55*tga+20.2938;
 622    xmax=24.15*tga+20.2938;
 623    TGeoTrd1 *ob2 = new TGeoTrd1(xmin,xmax,2.915,0.8);
 624    TGeoVolume *ob2v = new TGeoVolume("TPC_ORB2",ob2,m3);
 625    //
 626    xmin=36.1*tga+20.2938;
 627    xmax=36.5*tga+20.2938;
 628    TGeoTrd1 *ob3 = new TGeoTrd1(xmin,xmax,2.915,0.2);
 629    TGeoVolume *ob3v = new TGeoVolume("TPC_ORB3",ob3,m3);
 630    //
 631    xmin=49.0*tga+20.2938;
 632    xmax=50.6*tga+20.2938;
 633    TGeoTrd1 *ob4 = new TGeoTrd1(xmin,xmax,2.915,0.8);
 634    TGeoVolume *ob4v = new TGeoVolume("TPC_ORB4",ob4,m3);
 635    //
 636    xmin=63.6*tga+20.2938;
 637    xmax=64.0*tga+20.2938;
 638    TGeoTrd1 *ob5 = new TGeoTrd1(xmin,xmax,2.915,0.2);
 639    TGeoVolume *ob5v = new TGeoVolume("TPC_ORB5",ob5,m3);
 640    //
 641    xmin=75.5*tga+20.2938;
 642    xmax=77.15*tga+20.2938;
 643    TGeoTrd1 *ob6 = new TGeoTrd1(xmin,xmax,2.915,0.8);
 644    TGeoVolume *ob6v = new TGeoVolume("TPC_ORB6",ob6,m3);
 645    //
 646    xmin=88.7*tga+20.2938;
 647    xmax=89.1*tga+20.2938;
 648    TGeoTrd1 *ob7 = new TGeoTrd1(xmin,xmax,2.915,0.2);
 649    TGeoVolume *ob7v = new TGeoVolume("TPC_ORB7",ob7,m3);
 650    //
 651    oempv->AddNode(ob1v,1,new TGeoTranslation(0.,0.975,-39.25));
 652    oempv->AddNode(ob2v,1,new TGeoTranslation(0.,0.975,-26.3));
 653    oempv->AddNode(ob3v,1,new TGeoTranslation(0.,0.975,-13.35));
 654    oempv->AddNode(ob4v,1,new TGeoTranslation(0.,0.975,0.15));
 655    oempv->AddNode(ob5v,1,new TGeoTranslation(0.,0.975,14.15));
 656    oempv->AddNode(ob6v,1,new TGeoTranslation(0.,0.975,26.7));
 657    oempv->AddNode(ob7v,1,new TGeoTranslation(0.,0.975,39.25));
 658    // vertical bars
 659    TGeoBBox *ob8 = new TGeoBBox(0.8,2.915,5.1);
 660    TGeoBBox *ob9 = new TGeoBBox(0.8,2.915,5.975);
 661    TGeoBBox *ob10 = new TGeoBBox(0.8,2.915,5.775);
 662    TGeoBBox *ob11 = new TGeoBBox(0.8,2.915,6.25);
 663    TGeoBBox *ob12 = new TGeoBBox(0.8,2.915,6.5);
 664    //
 665    TGeoVolume *ob8v = new TGeoVolume("TPC_ORB8",ob8,m3);
 666    TGeoVolume *ob9v = new TGeoVolume("TPC_ORB9",ob9,m3);
 667    TGeoVolume *ob10v = new TGeoVolume("TPC_ORB10",ob10,m3);
 668    TGeoVolume *ob11v = new TGeoVolume("TPC_ORB11",ob11,m3);
 669    TGeoVolume *ob12v = new TGeoVolume("TPC_ORB12",ob12,m3);
 670    //
 671    oempv->AddNode(ob8v,1,new TGeoTranslation(0.,0.975,-44.55));
 672    oempv->AddNode(ob8v,2,new TGeoTranslation(0.,0.975,44.55));
 673    oempv->AddNode(ob9v,1,new TGeoTranslation(0.,0.975,-33.075));
 674    oempv->AddNode(ob9v,2,new TGeoTranslation(0.,0.975,-19.525));
 675    oempv->AddNode(ob10v,1,new TGeoTranslation(0.,0.975,20.125));
 676    oempv->AddNode(ob10v,2,new TGeoTranslation(0.,0.975,33.275));
 677    oempv->AddNode(ob11v,1,new TGeoTranslation(0.,0.975,-6.9));
 678    oempv->AddNode(ob12v,1,new TGeoTranslation(0.,0.975,7.45));
 679    //
 680    // holes for connectors
 681    //
 682    fileName = gSystem->Getenv("ALICE_ROOT");
 683    fileName += "/TPC/conn_oroc.dat";
 684    in.open(fileName.Data(), ios_base::in); // asci file
 685    for(Int_t i =0;i<78;i++){
 686       Double_t y =3.89;
 687       Double_t x,z,ang;
 688       Double_t x1,z1,x2,z2;
 689       in>>x>>z>>ang;
 690       Double_t xr = 4.7*TMath::Sin(ang*TMath::DegToRad());
 691       Double_t zr = 4.7*TMath::Cos(ang*TMath::DegToRad());
 692       //
 693       x1=xr+x; x2=-xr+x; z1=zr+z; z2 = -zr+z;
 694       //
 695       TGeoRotation *rr = new TGeoRotation();
 696       rr->RotateY(ang);
 697       z1-=54.95;
 698       z2-=54.95;
 699       TGeoCombiTrans *trans1 = new TGeoCombiTrans("trans1",x1,y,z1,rr);
 700       TGeoCombiTrans *trans2 = new TGeoCombiTrans("trans2",x2,y,z2,rr);
 701       obdv->AddNode(connv,i+1,trans1);
 702       obdv->AddNode(connv,i+79,trans2);
 703    }
 704    in.close();
 705    // cap
 706    new TGeoTrd1("ocap",23.3874,43.5239,1.09,57.1);
 707    new TGeoTrd1("ohole",22.2938,40.5084,1.09,51.65);
 708    TGeoTranslation *tr5 = new TGeoTranslation("tr5",0.,0.,-2.15);
 709    tr5->RegisterYourself();
 710    TGeoCompositeShape *oc = new TGeoCompositeShape("ocap-ohole:tr5");
 711    TGeoVolume *ocv = new TGeoVolume("TPC_ORCAP",oc,m3);
 712    //
 713    // pad plane and wire fixations
 714    //
 715    TGeoTrd1 *opp = new TGeoTrd1(23.3874,43.5239,0.3,57.1);
 716    TGeoVolume *oppv = new TGeoVolume("TPC_ORPP",opp,m4);
 717    //
 718    tga=(43.5239-23.3874)/114.2;
 719    TGeoPara *f3 = new TGeoPara(.7,.6,57.1,0.,-10.,0.);
 720    TGeoPara *f4 = new TGeoPara(.7,.6,57.1,0.,10.,0.);
 721    xx = 57.1*tga+23.3874-0.7;
 722    TGeoVolume *f3v = new TGeoVolume("TPC_ORF1",f3,m4);
 723    TGeoVolume *f4v = new TGeoVolume("TPC_ORF2",f4,m4);
 724    //
 725    TGeoVolumeAssembly *oroc = new TGeoVolumeAssembly("TPC_OROC");
 726    //
 727    oroc->AddNode(obdv,1);
 728    oroc->AddNode(ocv,1,new TGeoTranslation(0.,3.1,2.15));
 729    oroc->AddNode(oppv,1,new TGeoTranslation(0.,4.49,2.15));
 730    oroc->AddNode(f3v,1,new TGeoTranslation(-xx,5.39,2.15));
 731    oroc->AddNode(f4v,1,new TGeoTranslation(xx,5.39,2.15));
 732    //
 733    // now iroc and oroc are placed into a sector...
 734    //
 735    TGeoVolumeAssembly *secta = new TGeoVolumeAssembly("TPC_SECT"); // a-side
 736    TGeoVolumeAssembly *sectc = new TGeoVolumeAssembly("TPC_SECT"); // c-side
 737    TGeoRotation rot1("rot1",90.,90.,0.);
 738    TGeoRotation rot2("rot2");
 739    rot2.RotateY(10.);
 740    TGeoRotation *rot = new TGeoRotation("rot");
 741    *rot=rot1*rot2;
 742    //
 743    Double_t x0,y0;
 744    x0=110.2*TMath::Cos(openingAngle);
 745    y0=110.2*TMath::Sin(openingAngle);
 746    TGeoCombiTrans *combi1a = new TGeoCombiTrans("combi1",x0,y0,1.09+0.195,rot); //a-side
 747    TGeoCombiTrans *combi1c = new TGeoCombiTrans("combi1",x0,y0,1.09+0.222,rot); //c-side
 748    x0=188.45*TMath::Cos(openingAngle);
 749    y0=188.45*TMath::Sin(openingAngle);
 750    TGeoCombiTrans *combi2a = new TGeoCombiTrans("combi2",x0,y0,0.99+0.195,rot); //a-side
 751    TGeoCombiTrans *combi2c = new TGeoCombiTrans("combi2",x0,y0,0.99+0.222,rot); //c-side
 752    //
 753    // A-side
 754    //
 755    secta->AddNode(ch,1);
 756    secta->AddNode(iroc,1,combi1a);
 757    secta->AddNode(oroc,1,combi2a);
 758    //
 759    // C-side
 760    //
 761    sectc->AddNode(ch,1);
 762    sectc->AddNode(iroc,1,combi1c);
 763    sectc->AddNode(oroc,1,combi2c);
 764    //
 765    // now I try to make  wheels...
 766    //
 767    TGeoVolumeAssembly *wheela = new TGeoVolumeAssembly("TPC_ENDCAP");
 768    TGeoVolumeAssembly *wheelc = new TGeoVolumeAssembly("TPC_ENDCAP");
 769    //
 770    for(Int_t i =0;i<18;i++){
 771      Double_t phi = (20.*i);
 772      TGeoRotation *r = new TGeoRotation();
 773      r->RotateZ(phi);
 774      wheela->AddNode(secta,i+1,r);
 775      wheelc->AddNode(sectc,i+1,r);
 776
 777    }
 778    // wheels in the drift volume!
 779    TGeoCombiTrans *combi3 = new TGeoCombiTrans("combi3",0.,0.,256.6,ref);
 780    v9->AddNode(wheela,1,combi3);
 781    v9->AddNode(wheelc,2,new TGeoTranslation(0.,0.,-256.6));
 782
 783    //_____________________________________________________________
 784    // service support wheel
 785    //_____________________________________________________________
 786   TGeoPgon *sw = new TGeoPgon(0.,20.,1,2);
 787   sw->DefineSection(0,-4.,80.5,251.75);
 788   sw->DefineSection(1,4.,80.5,251.75);
 789   TGeoVolume *swv = new TGeoVolume("TPC_SWSEG",sw,m3); //Al
 790   //
 791   thick=1.;
 792   shift = thick/TMath::Sin(openingAngle);
 793   TGeoPgon *sh = new TGeoPgon(0.,20.,1,2);
 794   sh->DefineSection(0,-4.,81.5-shift,250.75-shift);
 795   sh->DefineSection(1,4.,81.5-shift,250.75-shift);
 796   TGeoVolume *shv = new TGeoVolume("TPC_SWS1",sh,m1); //Air
 797   //
 798   TGeoMedium *m9 =  gGeoManager->GetMedium("TPC_Si");
 799   TGeoPgon *el = new TGeoPgon(0.,20.,1,2);
 800   el->DefineSection(0,-1.872,81.5-shift,250.75-shift);
 801   el->DefineSection(1,1.872,81.5-shift,250.75-shift);
 802   TGeoVolume *elv = new TGeoVolume("TPC_ELEC",el,m9); //Si
 803   //
 804   shv->AddNode(elv,1);
 805   //
 806   //
 807   ys = shift*TMath::Sin(openingAngle);
 808   xs = shift*TMath::Cos(openingAngle);
 809   swv->AddNode(shv,1,new TGeoTranslation(xs,ys,0.));
 810   // cover
 811   TGeoPgon *co = new TGeoPgon(0.,20.,1,2);
 812   co->DefineSection(0,-0.5,77.,255.25);
 813   co->DefineSection(1,0.5,77.,255.25);
 814   TGeoVolume *cov = new TGeoVolume("TPC_SWC1",co,m3);//Al
 815   // hole in a cover
 816   TGeoPgon *coh = new TGeoPgon(0.,20.,1,2);
 817   shift=4./TMath::Sin(openingAngle);
 818   coh->DefineSection(0,-0.5,85.-shift,247.25-shift);
 819   coh->DefineSection(1,0.5,85.-shift,247.25-shift);
 820   //
 821   TGeoVolume *cohv = new TGeoVolume("TPC_SWC2",coh,m1);
 822   //
 823   ys = shift*TMath::Sin(openingAngle);
 824   xs = shift*TMath::Cos(openingAngle);
 825   cov->AddNode(cohv,1,new TGeoTranslation(xs,ys,0.));
 826   //
 827   // Sector as an Assembly
 828   //
 829   TGeoVolumeAssembly *swhs = new TGeoVolumeAssembly("TPC_SSWSEC");
 830   swhs->AddNode(swv,1);
 831   swhs->AddNode(cov,1,new TGeoTranslation(0.,0.,-4.5));
 832   swhs->AddNode(cov,2,new TGeoTranslation(0.,0.,4.5));
 833   //
 834   // SSW as an Assembly of sectors
 835   //
 836  TGeoVolumeAssembly *swheel = new TGeoVolumeAssembly("TPC_SSWHEEL");
 837    for(Int_t i =0;i<18;i++){
 838      Double_t phi = (20.*i);
 839      TGeoRotation *r = new TGeoRotation();
 840      r->RotateZ(phi);
 841      swheel->AddNode(swhs,i+1,r);
 842    }
 843    v1->AddNode(swheel,1,new TGeoTranslation(0.,0.,-284.6));
 844    v1->AddNode(swheel,2,new TGeoTranslation(0.,0.,284.6));
 845
 846    // sensitive strips
 847    TGeoMedium *m8 = gGeoManager->GetMedium("TPC_Ne-CO2-2");
 848    Int_t totrows;
 849    totrows = fTPCParam->GetNRowLow() + fTPCParam->GetNRowUp();
 850    Double_t *upar;
 851    upar=NULL;
 852    gGeoManager->Volume("TPC_Strip","PGON",m8->GetId(),upar);
 853    upar=new Double_t [10];
 854    upar[0]=0.;
 855    upar[1]=360.;
 856    upar[2]=18.;
 857    upar[3]=2.;
 858    //
 859    upar[4]=-124.8;
 860    upar[7]=124.8;
 861
 862    Double_t rlow=fTPCParam->GetPadRowRadiiLow(0);
 863
 864    upar[5]=rlow;
 865    upar[6]=rlow+.01;
 866    upar[8]=upar[5];
 867    upar[9]=upar[6];
 868    //
 869    gGeoManager->Node("TPC_Strip",1,"TPC_Drift",0.,0.,124.82,0,kTRUE,upar,10);
 870    gGeoManager->Node("TPC_Strip",totrows+1,
 871                      "TPC_Drift",0.,0.,-124.82,0,kTRUE,upar,10);
 872    //
 873    // now, strips
 874    //
 875      //lower sectors
 876      for(Int_t i=2;i<fTPCParam->GetNRowLow()+1;i++){
 877        rlow=fTPCParam->GetPadRowRadiiLow(i-1);
 878        upar[5]=rlow;
 879        upar[6]=rlow+.01;
 880        upar[8]=upar[5];
 881        upar[9]=upar[6];
 882        gGeoManager->Node("TPC_Strip",i,
 883                          "TPC_Drift",0.,0.,124.82,0,kTRUE,upar,10);
 884        gGeoManager->Node("TPC_Strip",totrows+i,
 885                          "TPC_Drift",0.,0.,-124.82,0,kTRUE,upar,10);
 886      }
 887      //upper sectors
 888      for(Int_t i=1;i<fTPCParam->GetNRowUp()+1;i++){
 889        rlow=fTPCParam->GetPadRowRadiiUp(i-1);
 890        upar[5]=rlow;
 891        upar[6]=rlow+.01;
 892        upar[8]=upar[5];
 893        upar[9]=upar[6];
 894        gGeoManager->Node("TPC_Strip",i+fTPCParam->GetNRowLow(),
 895                          "TPC_Drift",0.,0.,124.82,0,kTRUE,upar,10);
 896        gGeoManager->Node("TPC_Strip",totrows+i+fTPCParam->GetNRowLow(),
 897                          "TPC_Drift",0.,0.,-124.82,0,kTRUE,upar,10);
 898      }
 899
 900   //----------------------------------------------------------
 901   // TPc Support Rods - MAKROLON
 902   //----------------------------------------------------------
 903   TGeoMedium *m6=gGeoManager->GetMedium("TPC_Makrolon");
 904   TGeoMedium *m7=gGeoManager->GetMedium("TPC_Cu");
 905   TGeoMedium *m10 =  gGeoManager->GetMedium("TPC_Alumina");
 906   TGeoMedium *m11 =  gGeoManager->GetMedium("TPC_Peek");
 907   // upper and lower rods differ in length!
 908   delete [] upar;
 909   upar=NULL;
 910   gGeoManager->Volume("TPC_Rod","TUBE",m6->GetId(),upar);
 911   upar=new Double_t [3];
 912   upar[0]=1.8;
 913   upar[1]=2.2;
 914
 915   //
 916   //HV rods - makrolon + 0.58cm (diameter) Cu
 917   TGeoTube *hvr = new TGeoTube(0.,2.2,126.64);
 918   TGeoTube *hvc = new TGeoTube(0.,0.29,126.64);
 919   //
 920   TGeoVolume *hvrv = new TGeoVolume("TPC_HV_Rod",hvr,m6);
 921   TGeoVolume *hvcv = new TGeoVolume("TPC_HV_Cable",hvc,m7);
 922   hvrv->AddNode(hvcv,1);
 923   //
 924   // resistor rods
 925   //
 926   TGeoTube *cri = new TGeoTube(0.,0.45,126.64); //inner
 927   TGeoTube *cro = new TGeoTube(0.,0.45,126.54); //outer
 928   TGeoTube *cwi = new TGeoTube(0.,0.15,126.64); // water inner
 929   TGeoTube *cwo = new TGeoTube(0.,0.15,126.54); // water outer
 930   //
 931   TGeoVolume *criv = new TGeoVolume("TPC_CR_I",cri,m10);
 932   TGeoVolume *crov = new TGeoVolume("TPC_CR_O",cro,m10);
 933   TGeoVolume *cwiv = new TGeoVolume("TPC_W_I",cwi,m11);
 934   TGeoVolume *cwov = new TGeoVolume("TPC_W_O",cwo,m11);
 935   //
 936   // ceramic rod with water
 937   //
 938   criv->AddNode(cwiv,1);
 939   crov->AddNode(cwov,1);
 940   //
 941   TGeoTube *pri =new TGeoTube(0.2,0.35,126.64); //inner
 942   TGeoTube *pro = new TGeoTube(0.2,0.35,126.54); //outer
 943   //
 944   // peek rod
 945   //
 946   TGeoVolume *priv = new TGeoVolume("TPC_PR_I",pri,m12);
 947   TGeoVolume *prov = new TGeoVolume("TPC_PR_O",pro,m12);
 948   //
 949   // resistor rods assembly
 950   //
 951    TGeoRotation *rotr = new TGeoRotation("rotr");
 952    rotr->RotateZ(-21.);
 953   //
 954   TGeoTube *rri = new TGeoTube(1.8,2.2,126.64);//inner
 955   TGeoTube *rro = new TGeoTube(1.8,2.2,126.54);//inner
 956   //
 957   TGeoVolume *rriv = new TGeoVolume("TPC_RR_I",rri,m6);
 958   TGeoVolume *rrov = new TGeoVolume("TPC_RR_O",rro,m6);
 959   //
 960   //
 961   TGeoVolumeAssembly *rrin = new TGeoVolumeAssembly("TPC_RROD_I");
 962   TGeoVolumeAssembly *rrou = new TGeoVolumeAssembly("TPC_RROD_O");
 963   rrin->AddNode(rriv,1);
 964   rrin->AddNode(criv,1,new TGeoTranslation(0.5,0.866, 0.));
 965   rrin->AddNode(criv,2,new TGeoTranslation(0.5,-0.866, 0.));
 966   rrin->AddNode(priv,1);
 967   //
 968   rrou->AddNode(rrov,1);
 969   rrou->AddNode(crov,1,new TGeoTranslation(0.5,0.866, 0.));
 970   rrou->AddNode(crov,2,new TGeoTranslation(0.5,-0.866, 0.));
 971   rrou->AddNode(prov,1);
 972   for(Int_t i=0;i<18;i++){
 973     Double_t angle,x,y;
 974     Double_t z,r;
 975     angle=TMath::DegToRad()*20.*(Double_t)i;
 976     r=81.5;
 977     x=r * TMath::Cos(angle);
 978     y=r * TMath::Sin(angle);
 979     upar[2]=126.64; //lower
 980     z= 126.96;
 981     if(i==3){
 982       v9->AddNode(rrin,1,new TGeoCombiTrans(x,y,z,rotr)); //A
 983       v9->AddNode(rrin,2,new TGeoCombiTrans(x,y,-z,rotr)); //C
 984     }
 985     else {
 986       gGeoManager->Node("TPC_Rod",i+1,"TPC_Drift",x,y,z,0,kTRUE,upar,3);//shaft
 987       gGeoManager->Node("TPC_Rod",i+19,"TPC_Drift",x,y,-z,0,kTRUE,upar,3);//muon
 988     }
 989
 990     //
 991     r=254.25;
 992     x=r * TMath::Cos(angle);
 993     y=r * TMath::Sin(angle);
 994     upar[2]=126.54; //upper
 995     z=127.06;
 996     //
 997     if(i==15){
 998       //v9->AddNode(hvrv,1,new TGeoTranslation(x,y,z));//A-side only
 999      v9->AddNode(hvrv,1,new TGeoTranslation(x,y,127.14));//A-side only
1000       gGeoManager->Node("TPC_Rod",i+55,"TPC_Drift",x,y,-z,0,kTRUE,upar,3);
1001     }
1002     else if(i==11){
1003       v9->AddNode(rrou,1,new TGeoCombiTrans(x,y,z,rotr)); //A
1004       v9->AddNode(rrou,2,new TGeoCombiTrans(x,y,-z,rotr)); //C
1005     }
1006     else{
1007     //
1008       gGeoManager->Node("TPC_Rod",i+37,"TPC_Drift",x,y,z,0,kTRUE,upar,3);
1009       gGeoManager->Node("TPC_Rod",i+55,"TPC_Drift",x,y,-z,0,kTRUE,upar,3);
1010     }
1011     gGeoManager->Node("TPC_Rod",i+36,"TPC_Drift",x,y,z,0,kTRUE,upar,3);
1012     gGeoManager->Node("TPC_Rod",i+54,"TPC_Drift",x,y,-z,0,kTRUE,upar,3);
1013   }
1014
1015   TGeoVolume *alice = gGeoManager->GetVolume("ALIC");
1016   alice->AddNode(v1,1);
1017
1018 } // end of function
1019
1020
1021 //_____________________________________________________________________________
1022 void AliTPCv1::CreateMaterials()
1023 {
1024   //
1025   // Define materials for Time Projection Chamber
1026   //
1027   AliTPC::CreateMaterials();
1028 }
1029
1030 //_____________________________________________________________________________
1031 void AliTPCv1::Init()
1032 {
1033   //
1034   // Initialises TPC detector after it has been created
1035   //
1036
1037   fIdSens=gMC->VolId("TPC_Strip"); // sensitive strip
1038
1039   printf("%s: *** TPC version 1 initialized***\n",ClassName());
1040
1041   // printf("TPC version 1 initialized\n");
1042 }
1043
1044 //_____________________________________________________________________________
1045 void AliTPCv1::StepManager()
1046 {
1047   //
1048   // Called at every step in the Time Projection Chamber
1049   //
1050   Int_t         copy, id, i;
1051   Float_t       hits[5];
1052   Int_t         vol[2];
1053   TLorentzVector p;
1054  //
1055
1056   id = gMC->CurrentVolID(copy);
1057   if(id!=fIdSens) return;
1058   if(gMC->TrackCharge() && gMC->IsTrackEntering()) {
1059
1060     //
1061     // Only charged tracks entering the sensitive volume
1062     //
1063
1064       gMC->TrackPosition(p);
1065   Double_t r = TMath::Sqrt(p[0]*p[0]+p[1]*p[1]);
1066   //
1067
1068   //
1069   Double_t angle = TMath::ACos(p[0]/r);
1070   angle = (p[1]<0.) ? TMath::TwoPi()-angle : angle;
1071   //
1072   // angular segment, it is not a real sector number...
1073   //
1074   Int_t sector=TMath::Nint((angle-fTPCParam->GetInnerAngleShift())/
1075                fTPCParam->GetInnerAngle());
1076   // rotate to segment "0"
1077   Float_t cos,sin;
1078   fTPCParam->AdjustCosSin(sector,cos,sin);
1079   Float_t x1 = p[0]*cos + p[1]*sin;
1080   Float_t y1 = TMath::Abs(-p[0]*sin + p[1]*cos);
1081   // calculate real sector number...
1082   if (x1>fTPCParam->GetOuterRadiusLow()){
1083     sector = TMath::Nint((angle-fTPCParam->GetOuterAngleShift())/
1084              fTPCParam->GetOuterAngle())+fTPCParam->GetNInnerSector();
1085     if (p[2]<0)         sector+=(fTPCParam->GetNOuterSector()>>1);
1086   }
1087     else
1088       if (p[2]<0) sector+=(fTPCParam->GetNInnerSector()>>1);
1089   //
1090   // here I have a sector number
1091   //
1092   vol[0]=sector;
1093   //
1094   Int_t totrows = fTPCParam->GetNRowLow()+fTPCParam->GetNRowUp();
1095   vol[1] = (copy<=totrows) ? copy-1 : copy-1-totrows;
1096   // row numbers are autonomous for lower and upper sectors
1097   if(vol[0] > fTPCParam->GetNInnerSector()) {
1098      vol[1] -= fTPCParam->GetNRowLow();
1099   }
1100   Double_t range = (sector<36) ? fTPCParam->GetYInner(vol[1]) :
1101                    fTPCParam->GetYOuter(vol[1]);
1102   if(y1>range) return;
1103      if(vol[1] == 0){
1104
1105         // because Jouri wants to have this
1106
1107         gMC->TrackMomentum(p);
1108         hits[0]=p[0];
1109         hits[1]=p[1];
1110         hits[2]=p[2];
1111         hits[3]=0.; // this hit has no energy loss
1112         // Get also the track time for pileup simulation
1113         hits[4]=gMC->TrackTime();
1114
1115         AddHit(gAlice->GetMCApp()->GetCurrentTrackNumber(), vol,hits); // M.I.
1116      }
1117    gMC->TrackPosition(p);
1118       for(i=0;i<3;++i) hits[i]=p[i];
1119       hits[3]=1; //I'd like to have something positive here (I.Belikov)
1120       // Get also the track time for pileup simulation
1121       hits[4]=gMC->TrackTime();
1122
1123       AddHit(gAlice->GetMCApp()->GetCurrentTrackNumber(), vol,hits); // M.I.
1124
1125   }// track entering sensitive strip
1126
1127 }
1128 //_____________________________________________________________________________
1129
1130
1131